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传播 速 度 : 55 phrases in 18 subjects |
Air defense | 2 |
Aviation | 1 |
Earth sciences | 1 |
Electric machinery | 1 |
Electronics | 2 |
Engineering geology | 1 |
Explosives and Explosive Ordnance Disposal | 4 |
Geophysics | 2 |
Hydroelectric power stations | 3 |
Metallurgy | 3 |
Oil / petroleum | 2 |
Radio | 1 |
Rail transport | 2 |
Refrigeration | 1 |
Space | 3 |
Superconductivity | 1 |
Technology | 24 |
Water resources | 1 |